Journal ArticleDOI
Density-driven damage mechanics (D3-M) model for concrete I: mechanical damage
Pavitra T. Murru,Christa E. Torrence,Zachary Grasley,Kumbakonam R. Rajagopal,P. Alagappan,Edward J. Garboczi +5 more
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In this paper, a new approach is proposed to model the damage in concrete using fracture mechanics, continuum damage mechanics, and failure envelope theories, which is based on the failure envelope theory.Abstract:
Damage in concrete has been modelled using various approaches such as fracture mechanics, continuum damage mechanics and failure envelope theories. This study proposes a new approach to model the i...read more
Citations
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An implicit constitutive relation for describing the small strain response of porous elastic solids whose material moduli are dependent on the density
TL;DR: In this paper, the authors developed a relation that is linear in both the Cauchy stress and the linearized strain by linearizing implicit constitutive relations between the stress and strain.
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Stress concentration due to the presence of a hole within the context of elastic bodies
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Stress concentration due to the bi-axial deformation of a plate of a porous elastic body with a hole
Journal ArticleDOI
Density driven damage mechanics (D3-M) model for concrete II: fully coupled chemo-mechanical damage
Pavitra T. Murru,Zachary Grasley,Christa E. Torrence,Kumbakonam R. Rajagopal,Edward J. Garboczi +4 more
TL;DR: In this paper, a density driven damage mechanics approach and its application to model mechanical damage in concrete are presented, where chemical and chemo-mechanical damage in concretized concrete is modeled.
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On an Implicit Model Linear in Both Stress and Strain to Describe the Response of Porous Solids.
TL;DR: To treat well-posedness of the quasi-linear elliptic problem, the one-parameter dependence, regularization of the linear-fractional singularity by thresholding, and applying the Browder–Minty existence theorem for the regularized problem are relied on.
References
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Journal ArticleDOI
Improved Nonlinear Model for Concrete Fracture
TL;DR: In this article, a nonlinear model for the fracture process zone (FPZ) that exists at the tip of a crack in concrete is developed through the interactive use of experimental data and finite element analysis of crack-line-wedge-loaded double-cantilever-beam (CLWL-DCB) specimens.
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Biaxial fracture tests on concrete — Development and experience
TL;DR: In this paper, the fracture energy and nominal notch tensile strength of concrete buildings were determined by means of a hydraulic pressure device, where rectangular-shaped notched specimens were broken under a defined biaxial state of stress with stable crack propagation.
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Snapback instability at crack ligament tearing and its implication for fracture micromechanics
TL;DR: In this article, the authors analyzed the asymptotic behavior at ligament tearing based on St.-Venant's principle and showed that when the ligament transmits a force (mode I, II or III), its final tearing is always characterized by snapback instability, which determines maximum possible displacement due to crack.
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Variability of Compressive Strength of Concrete Cores
TL;DR: In this paper, a comparative study of alternative probabilistic models to describe the compressive strength of concrete cores was conducted, and the results indicated that none of the described probability methods are adequate for determining the variability of the compressed strength of the concrete cores.